So, after a little more research, I find the Celica and the Supras all used the same rear fitting on the tranny, so the W58 SHOULD be able to bolt up to the tranny mounts.
What I haven't been able to find out is if the bell housing will work between the 22RE in the Celica and the 7M-GE in the Supra.
Also, do I need a different drive shaft?
ALSO, I have a GT-S Celica, with the IRS. I'm willing to bet that the differentials are the same also.
No wonder Toyota trannies are bulletproof. The W58 is rated (or so i've seen) between 230 and 325 HP. The 22RE in the '85 Celica put out
140-155HP, and the Supra 7M-GE 200 HP. Now, in the Celica, you weren't anywhere NEAR approcahing the limit of the transmission!